JPH0231274Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a cutting correction device for a seam welding electrode ring, and the work piece to be welded is installed opposite to the seam electrode ring and adheres to the welding electrode ring as welding progresses. It is used to continually remove plating metal, etc., and at the same time to modify the cross-sectional shape of the outer circumferential surface of the electrode ring so that it remains constant even if the diameter is reduced.

(Prior Art) A cutting correction device for a seam welding electrode wheel has been in existence for a long time. The electrode ring uses copper-based metal, and if the outer periphery is deformed or the plating metal film of the workpiece is transferred, the welding strength cannot be maintained constant, so small cutting corrections are constantly made. There is.
For this reason, the outer diameter of the electrode ring gradually decreases,
Although it is desirable to improve followability by cutting with approximately the same pressure no matter how the outer diameter changes, it is difficult to satisfy this technical requirement by using only a cylinder or only a spring.

(Problems to be solved by the invention) The present invention uses a cylinder to bear the pressing force of the contact roller that prevents the bit tip from coming into excessive contact with the outer periphery of the seam welding electrode ring. We consider that a configuration that can satisfy the above-mentioned technical requirements can be obtained by separating the cylinder from the pressing force, and consider this to be a problem to be solved.

(Means for solving the problems) The present invention aims to solve the problems mentioned in the previous section, and includes a pair of guide pieces 8 that are pushed in the direction of the seam welding electrode ring a by the cylinder 4.
A pair of contact rollers 10 that come into elastic contact with the outer periphery of the electrode ring are pivotally supported at each tip of the pair of guide pieces, and
A tool support piece 11 is provided which is pushed in the direction of the electrode ring a using the pair of guide pieces as a guide by a spring 13 whose one end is joined to the guide piece, and the support piece includes:
Any of the ridge angles 19 of the circumferential surface 20 of the regular polygonal bit tip 18, which has an even number of internal angles and has cutting grooves 21 formed on the straight circumferential surface that coincide with the circumferential surface of the welding ring, is used as the circumferential surface of the electrode ring. The center of the tool tip is fixed to the tool support piece 11 by screwing, and as the diameter of the seam welding electrode ring decreases, the tool support piece 11 and the tool tip 18 are fixed to the spring 13.
It is characterized by moving in a direction that resists the elasticity of.

(Function) The present invention has the above-described configuration, and when the diameter of the seam welding electrode ring a is gradually reduced by cutting correction, the pair of guide pieces 8, 8 are pushed out by the cylinder 4, and each contact roller 10 and 10 follow the reduction in the diameter of the welding electrode ring a. Also, the guide piece 8,
The tool support piece 11, which is pushed by a spring 13 with one end hung on the upper end of the tool support piece 11, presses the tool tip 18 against the seam welding electrode ring a by using the guide pieces 8, 8 as guides. A cutting groove 21 having a concave arc shape in cross section that matches the circumferential surface of the welding electrode ring a is formed on the straight circumferential surface 20, and any of the edge angles of each circumferential surface 20 are welded. Since the electrode ring a is pressed against the electrode ring a by the elasticity of the spring 13 and the cutting correction is applied to the electrode ring a, the seam welding electrode ring is constantly subjected to cutting correction and the plating layer is not attached. If so, it is removed by cutting and welding to the workpiece is performed using a fresh modified circumferential surface. Guide piece pair 8, 8
The smaller the distance between the axes, the smaller the amount of movement of the bite tip 18 by the spring 13 even if the diameter of the seam electrode ring a changes.

(Effects) The present invention has the above-described structure and operation, and the contact rollers 10, 10 of the guide pieces 8, 8 are brought into pressure contact with the seam electrode ring a by the action of a cylinder, and large movements occur as the diameter of the electrode ring decreases. The amount is supported by a pair of guide pieces that are moved by being pushed by a cylinder, and a bite support piece that slides between the pair of guide pieces by the elasticity of a spring whose one end is supported by guide pieces 8, 8. 11 is provided, and the bite tip 18 is attached to the support piece 11. Therefore, the momentum of the bite support piece 11 and the bite tip 18 guided by the guide pieces 8, 8 is reduced by the spring 13 as the diameter of the seam welding electrode ring decreases. This can be done without contracting the cylinder 4 by only moving the amount that occurs against the elasticity of the bite tip 1.
By making the pressure of the spring 13, which handles the above-mentioned movement of the welding electrode 8, smaller than the pressure of the cylinder 4, it is possible to improve the followability of the bite tip 18 to the unevenness of the cutting surface on the circumferential surface of the seam welding electrode ring a, and also to reduce the pressure of the spring 13. Even when it is possible to adjust the elasticity, it has the effect of allowing almost no adjustment.

(Example) The attached drawing shows one example of the present invention.
2 is a perspective view of the tool support piece, FIG. 3 is a perspective view of the tool tip, and FIG. 4 is a sectional view showing the relationship between the tool tip and the welding electrode ring.

In FIG. 1, 1 is a support plate, and 3 is the support plate 1.
A second support plate is fixed to the support plate 1, and an air cylinder 4 is fixed to the support plate 1. Sliding guide pieces 7, 7 are provided on both sides of the second support plate 3. Reference numerals 8 and 8 denote a pair of guide pieces that are in contact with the sliding guide pieces 7 and 7 and can freely slide.The rear sides are connected by a connecting piece 9 to form a U-shape, and the connecting piece 9 is connected to the rod of the cylinder 4. 5
Connect to. Each guide piece 8, 8 has a contact roller 10, 10 pivotally supported at its tip, which contacts the outer periphery of the seam welding electrode wheel a. Tactile rollers 10, 10
The electrodes are brought into contact before and after an arbitrary diameter line of the seam electrode wheel a, and it is more effective to make the axial distance as small as possible.

Reference numeral 11 denotes a cutting tool support piece that is slidably fitted between the pair of guide pieces 8, 8, and is connected to the rod 5 of the cylinder 4 connected through the connecting piece 9, or the guide pieces 8, 8.
The tip of the coil spring 13 whose rear end was supported by
The rear end of the bite tip support piece 9 is contacted and pressed.

As shown in FIG. 2, the tool support piece 11 is provided with a chip fitting groove 15 at its tip, into which a tool chip 18 to be described later is fitted with one inner corner facing toward the rear.
A mounting piece 16 is protruded from the bottom of the notch 15, and a mounting hole 17 is aligned with the center of the bite chip 18.
will be established.

Reference numeral 18 denotes a bite chip, which in this embodiment is shown as a cube with a square plane.
0, a cutting groove 21 is provided that matches the cross-sectional shape of the circumferential surface of the seam welding electrode ring a in a male-female relationship, and a center hole 22 is bored in the center of the plane.

In this embodiment, the cutting grooves 21, 21 of the cutting tool tip 18 have four end faces, and one of the cutting grooves 21, 21 is in contact with the circumferential surface of the seam welding electrode ring a as shown in FIG. Mounting screw 2 that fits into the chip fitting groove 15 of No. 11 and passes through the center hole 22.
3 is screwed into the mounting hole 17 of the mounting piece 16 and fixed.

[Brief explanation of the drawing]

The attached drawings show one embodiment of the present invention.
2 is a perspective view of the tool support piece, FIG. 3 is a perspective view of the tool tip, and FIG. 4 is a sectional view showing the relationship between the tool tip and the welding electrode ring. a... Seam welding electrode ring, 4... Cylinder,
5...Rod, 8...Guide piece, 10...Touching roller, 11...Bite support piece, 13...Coil spring, 15...Chip fitting missing groove, 18...Chip bite, 19...Edge angle, 20... peripheral edge, 21...
Cutting groove, 22...center hole.

Claims (1)

[Scope of utility model registration request] A pair of guide pieces pushed in the direction of the seam welding electrode ring by a cylinder is provided, and each tip of the pair of guide pieces pivotally supports a pair of contact rollers that come into elastic contact with the outer periphery of the electrode ring, and one end is attached to the guide piece. A tool support piece is provided which is pushed in the direction of the electrode ring using the pair of guide pieces as a guide by a joined spring, and the support piece has an even number of internal angles and a straight circumferential surface that is aligned with the circumferential surface of the welding ring. One of the ridge angles of the circumferential surface of a regular polygonal bit tip having matching cutting grooves is brought into contact with the circumferential surface of the electrode ring, and the center of the bit tip is fixed to the bit supporting piece by screwing, thereby forming a seam welded electrode ring. A cutting correction device for a seam welding electrode ring, characterized in that the tool support piece and the tool tip are moved in a direction that resists the elasticity of the spring as the diameter of the tool member decreases.